Court finds that a New Jersey law which included students of Catholic schools in reimbursements to parents who sent their children to school on buses operated by the public transportation system does not violate the Establishment Clause of the First Amendment.

Court holds that the state of Maryland cannot require applicants for public office to swear that they believed in the existence of God. The court unanimously rules that a religious test violates the Establishment Clause.

State statue banning teaching of evolution is unconstitutional. A state cannot alter any element in a course of study in order to promote a religious point of view. A state's attempt to hide behind a nonreligious motivation will not be given credence unless that state can show a secular reason as the foundation for its actions.

Established the three part test for determining if an action of government violates First Amendment's separation of church and state:
1) the government action must have a secular purpose;
2) its primary purpose must not be to inhibit or to advance religion;
3) there must be no excessive entanglement between government and religion.

State's moment of silence at public school statute is unconstitutional where legislative record reveals that motivation for statute was the encouragement of prayer. Court majority silent on whether "pure" moment of silence scheme, with no bias in favor of prayer or any other mental process, would be constitutional.

Unconstitutional for a school district to provide any clergy to perform nondenominational prayer at elementary or secondary school graduation. It involves government sponsorship of worship. Court majority was particularly concerned about psychological coercion to which children, as opposed to adults, would be subjected, by having prayers that may violate their beliefs recited at their graduation ceremonies.